swaybar: Improve i3bar proto implementation
Also reintroduce plaintext fallback for simple status lines.
This commit is contained in:
progandy
parent
d37169a927
commit
aa5930c966
147
swaybar/main.c
147
swaybar/main.c
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@ -67,6 +67,8 @@ char *output, *status_command;
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struct registry *registry;
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struct window *window;
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bool dirty = true;
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typedef enum {UNDEF, TEXT, I3BAR} command_protocol;
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command_protocol protocol = UNDEF;
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struct colors colors = {
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.background = 0x000000FF,
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@ -100,6 +102,20 @@ struct colors colors = {
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},
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};
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#define I3JSON_MAXDEPTH 4
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#define I3JSON_UNKNOWN 0
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#define I3JSON_ARRAY 1
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#define I3JSON_STRING 2
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struct {
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int bufsize;
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char *buffer;
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char *line_start;
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bool escape;
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int depth;
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int state[I3JSON_MAXDEPTH+1];
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} i3json_state = { 0, NULL, NULL, false, 0, { I3JSON_UNKNOWN } };
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void swaybar_teardown() {
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window_teardown(window);
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if (registry) {
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@ -126,7 +142,6 @@ void swaybar_teardown() {
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}
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}
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void sway_terminate(void) {
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swaybar_teardown();
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exit(EXIT_FAILURE);
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@ -375,10 +390,14 @@ void render() {
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cairo_set_source_u32(window->cairo, colors.statusline);
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int width, height;
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if (status_line) {
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if (protocol == TEXT) {
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get_text_size(window, &width, &height, "%s", line);
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cairo_move_to(window->cairo, window->width - margin - width, margin);
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pango_printf(window, "%s", line);
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} else if (protocol == I3BAR && status_line) {
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int i;
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int moved = 0;
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for ( i = status_line->length - 1; i >= 0; --i ) {
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for (i = status_line->length - 1; i >= 0; --i) {
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struct status_block *block = status_line->items[i];
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if (block->full_text) {
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get_text_size(window, &width, &height, "%s", block->full_text);
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@ -539,6 +558,81 @@ void parse_json(const char *text) {
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json_object_put(results);
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}
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int i3json_handle(FILE *file) {
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char *c;
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int handled = 0;
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// handle partially buffered data
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// make sure 1023+1 bytes at the end are free
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if (i3json_state.line_start) {
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int len = strlen(i3json_state.line_start);
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memmove(i3json_state.buffer, i3json_state.line_start, len+1);
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if (i3json_state.bufsize < len+1024) {
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i3json_state.bufsize += 1024;
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i3json_state.buffer = realloc(i3json_state.buffer, i3json_state.bufsize);
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}
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c = i3json_state.buffer+len;
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i3json_state.line_start = i3json_state.buffer;
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} else if (!i3json_state.buffer) {
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i3json_state.buffer = malloc(1024);
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i3json_state.bufsize = 1024;
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c = i3json_state.buffer;
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} else {
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c = i3json_state.buffer;
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}
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if (!i3json_state.buffer) {
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sway_abort("Could not allocate buffer.");
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}
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// get fresh data at the end of the buffer
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if (!fgets(c, 1023, file)) return -1;
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c[1023] = '\0';
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while (*c) {
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if (i3json_state.state[i3json_state.depth] == I3JSON_STRING) {
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if (!i3json_state.escape && *c == '"') {
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--i3json_state.depth;
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}
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i3json_state.escape = !i3json_state.escape && *c == '\\';
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} else {
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switch (*c) {
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case '[':
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++i3json_state.depth;
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if (i3json_state.depth > I3JSON_MAXDEPTH) {
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sway_abort("JSON too deep");
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}
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i3json_state.state[i3json_state.depth] = I3JSON_ARRAY;
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if (i3json_state.depth == 2) {
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i3json_state.line_start = c;
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}
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break;
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case ']':
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if (i3json_state.state[i3json_state.depth] != I3JSON_ARRAY) {
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sway_abort("JSON malformed");
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}
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--i3json_state.depth;
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if (i3json_state.depth == 1) {
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ssize_t len = c-i3json_state.line_start+1;
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char p = c[len];
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c[len] = '\0';
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parse_json(i3json_state.line_start);
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c[len] = p;
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++handled;
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i3json_state.line_start = c+1;
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}
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break;
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case '"':
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++i3json_state.depth;
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if (i3json_state.depth > I3JSON_MAXDEPTH) {
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sway_abort("JSON too deep");
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}
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i3json_state.state[i3json_state.depth] = I3JSON_STRING;
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break;
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}
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}
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++c;
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}
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return handled;
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}
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void poll_for_update() {
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fd_set readfds;
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int activity;
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@ -574,17 +668,43 @@ void poll_for_update() {
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if (status_command && FD_ISSET(pipefd[0], &readfds)) {
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sway_log(L_DEBUG, "Got update from status command.");
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fgets(line, sizeof(line), command);
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sway_log(L_DEBUG, "zzz %s", line);
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int l = strlen(line) - 1;
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if (line[l] == '\n') {
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line[l] = '\0';
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int linelen;
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switch (protocol) {
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case I3BAR:
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sway_log(L_DEBUG, "Got i3bar protocol.");
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if (i3json_handle(command) > 0) {
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dirty = true;
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}
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break;
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case TEXT:
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case UNDEF:
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sway_log(L_DEBUG, "Got text protocol.");
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fgets(line, sizeof(line), command);
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linelen = strlen(line) - 1;
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if (line[linelen] == '\n') {
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line[linelen] = '\0';
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}
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dirty = true;
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if (protocol == UNDEF) {
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protocol = TEXT;
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if (line[0] == '{') {
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// detect i3bar json protocol
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json_object *proto = json_tokener_parse(line);
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json_object *version;
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if (proto) {
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if (json_object_object_get_ex(proto, "version", &version)
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&& json_object_get_int(version) == 1
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) {
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sway_log(L_DEBUG, "Switched to i3bar protocol.");
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protocol = I3BAR;
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line[0] = '\0';
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}
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json_object_put(proto);
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}
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}
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}
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break;
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}
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if (line[0] == ',') {
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line[0] = ' ';
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}
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dirty = true;
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parse_json(line);
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}
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}
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}
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@ -681,6 +801,7 @@ int main(int argc, char **argv) {
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close(pipefd[1]);
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command = fdopen(pipefd[0], "r");
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setbuf(command, NULL);
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line[0] = '\0';
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}
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